Asian Markets Plunge Amidst Escalating US-Iran Tensions

Asia-Pacific stock markets experienced a significant downturn on Monday, March 23, 2026, as escalating tensions between the United States and Iran fueled investor anxiety. Major indexes across the region plummeted, reflecting concerns about potential disruptions to global energy supplies and a broader escalation of conflict in the Middle East.

Sharp Declines Across Major Markets

Japan’s Nikkei 225 index initially fell more than 5%, but partially recovered to close at 51,514.78 points, a decline of 3.48%. This brings the index’s losses since early March 2026 to over 13%, compounded by the weakening Japanese yen.

South Korea’s KOSPI index also faced substantial pressure, falling 4.5% at the open and reaching a 5.18% intraday drop to 5,481.61 points. Trading was temporarily halted when the KOSPI 200 futures index fell by more than 5%, triggering a circuit breaker to stabilize the market.

Australia’s S&P/ASX 200 index declined by 2.4%, even as Hong Kong’s Hang Seng Index fell 2.29% to 24,698 points.

Geopolitical Risks Threaten Energy Supplies

The primary driver of this market adjustment is heightened tensions in the Middle East. Statements from the US regarding Iran have raised concerns about potential disruptions to global energy supplies, particularly through the Strait of Hormuz, a critical oil transit route. President Donald Trump warned on Saturday that the US would “obliterate” Iran’s power infrastructure if Tehran did not fully reopen the Strait of Hormuz within 48 hours.

Iran has responded with warnings of strong retaliation should its energy infrastructure be attacked. These escalating threats are raising fears of a wider conflict, which is expected to negatively impact financial markets and regional investment flows. Iran’s Parliament speaker Mohammad Bagher Ghalibaf stated that attacks on its power plants would be met with retaliatory strikes on energy and oil infrastructure across the region.

Vietnamese Market Also Under Pressure

The Vietnamese stock market also experienced a correction, aligning with the broader regional trend. As of market close on March 20, the VN Index closed at 1,647.81 points, down 51.32 points (3.02%), and the HNX Index closed at 243.46 points, down 0.92%.

Expert Outlook

The overall decline in markets indicates widespread caution. Experts predict that geopolitical factors will continue to exert significant pressure on regional financial markets in the near term. Ponmudi R, CEO of Enrich Money, noted the intense risk aversion and panic selling across global equities.